I strongly suspect that most of the 159 Amazon reviewers of The Master and His Emissary: The Divided Brain and the Making of the Western World did not actually read the entire book. Not because it’s long, at 600 pages, but because the writing is often impenetrable. Here’s a sample: “There are several ways in which the Reformation anticipated the hermetic self-reflexivity of post-modernism, perfectly expressed in the infinite regress of self-referral within some of the visual images which Koerner examines [..]”.
This is from the second part of the book, in which the author boldly (foolishly?) understates to explain all of humankind (Western) history through the thesis of the collaborating brain hemispheres. The first part is much more accessible and convincing, as the author wades through published research to illustrates how the right hemisphere, the big-picture hemisphere, collaborates with the left hemisphere, the detail-oriented hemisphere. lf you pick up the book, you may want to stop after part 1.